Michael Soliman, most recently the state director for Menendez, will begin work as managing director on Sept. 17.

Soliman managed Menendez’s 2012 reelection campaign, and has worked for several other New Jersey Democrats, including the late Sen. Frank Lautenberg, Rep. Bill Pascrell and Rep. Steve Rothman.

“During his extensive career in public service, Michael Soliman has emerged as one of the state’s most talented political leaders, garnering well-deserved respect on both sides of the aisle in New Jersey and Washington,” said Mike DuHaime, a Mercury partner, in a statement.

“It is an honor to join such a prestigious and forward-thinking firm,” Soliman said. “I am thrilled to have the opportunity to help Mercury’s clients achieve a high-level of success.”

Soliman’s hire comes after Mercury announced on Tuesday that it had also brought on Adam Ereli, a former U.S. ambassador to Bahrain and a State Department spokesman.

Merged with Clark & Weinstock in 2011, the firm has made close to $3.7 million in lobbying fees so far this year, according to the Center for Responsive Politics.